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Subject[PATCH] vcpu hotplug fix for v3.3-rc3 (v1).
When playing with xl/xm vcpu-set I found out that Linux 3.3 has a bunch of problems.
Some of them were in generic code base (patches for that are queued up by Greg KH),
and some were in the Xen base. Previously I had posted:

xen/smp: Fix CPU online/offline bug triggering a BUG: scheduling while atomic.
xen/bootup: During bootup suppress XENBUS: Unable to read cpu state

and this is meant to be on top of those to make vCPU hotplugging work properly
with 3.3 kernel. Some of those should be back-ported to 3.0 but I am not sure
which ones (and if there are other ones as well) so won't do that until I get some time
to do a proper testing of them on v3.0.

If you want to full kitchensink, please see #testing branch. If you just want
to see those patches above (and others queued up for 3.3-rc3), take a look at
#stable/for-linus-fixes-3.3 in git://

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